Feature

[Photograph]: Aerial Mapping with Five-Lens Camera

Science at the World’s Crossroads

Trees Will Die Unless Heavy Rains Fall

Biting Birch Bark Designs Was Indians’ Lost Art

Present Geyser Action Theory Needs Changing

Same Parasite Infests Four Animal Groups

British Report Most Potent Form of Vitamin D Yet Known

Electromagnetism Explained by Riemannian Geometry

Camera and X-Rays Used to Locate Ulcers in Stomach

Front Matter

New Projector Will Produce Eclipses of Sun on Demand

Soporific Drug Numbs Brain but Goes Chiefly to Muscles